Add Edgrapi to Commercial & Proprietary Services

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Adds one entry under Commercial & Proprietary Services, next to the other SEC EDGAR data services (after FilingPulse).

Disclosure: I built and operate this.

What it is: a hosted API that parses SEC EDGAR filings into JSON: Form 4 insider trades, 8-K events, 13F holdings (fragment rows aggregated per CUSIP and put/call, so a filer like Berkshire's 89 information-table rows come back as its 29 positions), Schedule 13D/G stakes, and XBRL fundamentals. It's served over REST and a hosted MCP server at https://api.edgrapi.com/mcp.

Why this section, not Market Data & Data Sources: the linked GitHub repo is a thin zero-dependency Python client (MIT). The parsing runs on the hosted service, so under CONTRIBUTING it counts as repository-less commercial.

Against the commercial eligibility rules:

• Permanent free tier, no payment information: 100 credits every month on all endpoints, including MCP, no card. Calls cost 1-5 credits depending on the endpoint. Not a trial, demo or waitlist.
• Published pricing and limits: https://edgrapi.com/pricing
• Public documentation: https://edgrapi.com/docs
• Stable HTTPS URL with no affiliate or tracking parameters; the description states the service and the free-tier limit.

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